openwrtv3/target/linux/brcm2708/patches-4.9/950-0068-ASoC-wm8804-Implement-MCLK-configuration-options-add.patch
Rafał Miłecki fce21ae4cc brcm2708: rename all patches from raspberrypi git tree to use 950 prefix
Right now all brcm2708 patches are extracted from the non-mainline
raspberrypi/linux git tree. Many of them are hacks and/or are unneeded
in LEDE. Raspberry Pi is getting better and better mainline support so
it would be nice to finally start maintaining patches in a cleaner way:
1) Backport patches accepted in upstream tree
2) Start using upstream drivers
3) Pick only these patches that are needed for more complete support

Handling above tasks requires grouping patches - ideally using the same
prefixes as generic ones. It means we should rename existing patches to
use some high prefix. This will allow e.g. use 0xx for backported code.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Acked-by: Stijn Tintel <stijn@linux-ipv6.be>
2017-03-24 08:06:35 +01:00

49 lines
1.8 KiB
Diff

From 8432dc7c8a843e7c35d7624adc6653e13dd488a7 Mon Sep 17 00:00:00 2001
From: Daniel Matuschek <info@crazy-audio.com>
Date: Wed, 15 Jan 2014 21:41:23 +0100
Subject: [PATCH] ASoC: wm8804: Implement MCLK configuration options, add 32bit
support WM8804 can run with PLL frequencies of 256xfs and 128xfs for most
sample rates. At 192kHz only 128xfs is supported. The existing driver selects
128xfs automatically for some lower samples rates. By using an additional
mclk_div divider, it is now possible to control the behaviour. This allows
using 256xfs PLL frequency on all sample rates up to 96kHz. It should allow
lower jitter and better signal quality. The behavior has to be controlled by
the sound card driver, because some sample frequency share the same setting.
e.g. 192kHz and 96kHz use 24.576MHz master clock. The only difference is the
MCLK divider.
This also added support for 32bit data.
Signed-off-by: Daniel Matuschek <daniel@matuschek.net>
---
sound/soc/codecs/wm8804.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
--- a/sound/soc/codecs/wm8804.c
+++ b/sound/soc/codecs/wm8804.c
@@ -304,6 +304,7 @@ static int wm8804_hw_params(struct snd_p
blen = 0x1;
break;
case 24:
+ case 32:
blen = 0x2;
break;
default:
@@ -515,7 +516,7 @@ static const struct snd_soc_dai_ops wm88
};
#define WM8804_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | \
- SNDRV_PCM_FMTBIT_S24_LE)
+ SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S32_LE)
#define WM8804_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_64000 | \
@@ -543,7 +544,7 @@ static struct snd_soc_dai_driver wm8804_
};
static const struct snd_soc_codec_driver soc_codec_dev_wm8804 = {
- .idle_bias_off = true,
+ .idle_bias_off = false,
.component_driver = {
.dapm_widgets = wm8804_dapm_widgets,